Estrogenic compounds and animal growth promoters



United States Patent ()fi 3,373,037 Patented Mar. 12, 1968 ice 3,373,037 ESTROGENIC COMPOUNDS AND ANIMAL GROWTH PROMOTERS Richard L. Abbott, Monroe, La., assignor to Commercial Solvents Corporation, a corporation of Maryland No Drawing. Continuation-impart of application Ser. N 0. 561,350, June 29, 1966. This application Mar. 6, 1967, Ser. No. 620,604

Claims. (Cl. 99-2) ABSTRACT OF THE DISCLOSURE where R is selected from the group consisting of hydrogen, lower alkyl, lower saturated acylic acyl and benzyl and animal feeds containing the same.

This application is a continuation-in-part of application Ser. No. 561,350, filed June 29, 1966, now abandoned.

Products The present invention relates to new compounds and an object of the present invention is to provide compounds which have anti-infiammatory activity or aid in increasing the rate of growth in meat-producing animals, e.g. cattle, lamb and swine.

The most widely used anti-inflammatory agents are the adrenocorticoids such as cortisone, hydrocortisone, predisone and prednisolone. Although these adrenocorticoids possess highly effective anti-inflammatory activity, they are not without criticism since, with overdosage or prolonged or intensive treatment, it is not unusual to find manifestations of undesirable side effects such as adrenal atrophy, peptic ulcer, sodium and fluid retention, etc. Accordingly, the desirability of realizing other antiinflammatory agents is readily appreciated. 7

The compounds of this invention are illustrated by the formula:

The compounds of the present invention can be produced from the compound:

described in US. Patent 3,239,345, hereinafter referred to as the tetrahydro fermentation estrogenic substance (tetrahydro F.E.S.), by reduction in aqueous methanol with hydrogen in the presence of Raney nickel. There are two diastereoisomers of tetrahydro F.E.S. which can be distinguished by melting point and both are suitable starting materials for the compounds of this invention. The hydroxyl groups can be converted to ethers, e.g. methyl ethers, as taught in US. Patent 3,239,342. Compounds where R is benzyl are described in copending application Ser. No. 532,113, filed Mar. 7, 1966 now abandoned, and application Ser. No. 620,259, filed Mar. 3, 1967. US. Patent 3,239,347 describes F.E.S. compounds where R is acyl. In preparing compounds where R is a combination of alkyl and acyl, it can be desirable to first alkylate and then acylate the F.E.S. compound.

The following examples serve to illustrate the invention.

Example 1 Low melting (MG-148 C.) tetrahydro F.E.S. (0.401 g.) was dissolved in 200 ml. methanol plus 200 ml. methanol plus 200 ml. water and 10 g. Raney nickel and reduced for 10 hours at 1500 p.s.i. hydrogen and 200 C. The catalyst was filtered and washed with 20 ml. methanol. The methanol and water liquor was evaporated to dryness and the residue was extracted several times with ether to yield a mixture of isomers having the general formula Infrared spectra ultraviolet spectra and mass spectra confirm the structure.

Example II High melting (US-180 C.) tetrahydro F.E.S. (2.8 g.) is dissolved in 400 ml. methanol plus 300 ml. water and 10 g. Raney nickel and reduced for about 10 hours at 1500 p.s.i. hydrogen and 200 C. The catalyst is filtered and washed with methanol. The volume of the methanol and water liquor is then reduced to ml. under vacuum and mild heating and the residue is extracted with six 50 ml. portions of ether and with six 50 ml. portions of carbon tetrachloride to recover 1.6 g. ether extract and 0.85 g. carbon tetrachloride extract which are essentially identical and saturated F.E.S.

Example HI To a solution of 368 mg. of the compound produced in Example I in 8 ml. pyridine is added an excess of acetic anhydride and the mixture is left at room temperature for 16 hours. 25 ml. of water are then added and the mixture stored in a refrigerator for several hours. The solid precipitate is recovered by filtration, washed with water, vacuum dried and recrystallized from methanol to yield Dimethyl sulfate ml.) was added to a solution of 2.24 g. RES. in 80 ml. of a NaGI-I solution and ml. of water. The mixture was stirred for one-half hour at 18 to 20 C. (cooling bath) and an additional 5 ml. of dimethyl sulfate was added. After an additional 70 minutes of stirring at 20 to 26 C., the solid precipitate, Solid A, was collected by filtration, Washed with water and dried. The filtrate from Solid A was acidified with ml. of 12 N H to yield a second precipitate, Solid B, which was collected, washed with water and dried.

Solid A (0.79 g. having a melting point of 114 to 118 C.) was recrystallized from a mixture of 10 ml. water and 15 ml. ethanol to yield 0.66 g. of 2,4- dimethylether having a melting point of 108 to 110 C.

Solid B (1.39 g. having a melting point of 152 to 162 C.) was recrystallized twice from a mixture of water and alcohol to yield 0.8 g. of HRS. 2-monomethylether having a melting point of 169 to 174 C., with the methyl group replacing the hydrogen in the hydroxyl group in the position ortho to the ester group. Analysis of Solid B showedCalc. (C H O C, 68.65%; H, 7.28%;

OMe, 9.34%. Found, C, 67.97%; H, 7.16%; OMe, 9.28%.

Each of the F.E.S. 2,4-dimethylether and F.E.S. 2- monomethylether so produced are reduced according to the procedure of Example I. Acylation of the resulting compounds according to Example III produce, respectively,

Nitrosomethylurea in an amount of 1.2 g. was slowly added to a cold mixture of 3.6 ml. of 50% potassium hydroxide and 17 ml. of ether. After a few minutes the yellow ether layer ofthe mixture was decanted, dried over potassium hydroxide, and then added to a solution of 0.3 g. of RES. in 17 ml. of ether. The resulting yellow mixture was left overnight in a loosely stoppered flask and then ether and diazomethane were evaporated using a steam bath. The remaining gummy residue was crystallized by adding 3 ml. of water, heating to C., and adding ethanol almost to solution. On cooling, crystals formed yielding 0.137 g. of product having a melting point of 111 to 116 C. which was recrystallized in the same way to yield 0.082 g. of monomethyl F.E.S. having a melting point of 120 to 122 C. and analyzing-Cale.

4 (C H O C, 68.7%; H, 7.28%; OCI-I 9.34%. Found, C, 68.3%; H, 7.38%; OCH 9.17%.

The F.E.S. 4-monomethylether is reduced following the procedure of Example I and then acylated to the procedure of Example III.

Example VII F.E.S. 4-benzylether is reduced according to the procedure of Example 1.

Example VIII Anti-inflammatory activity is shown for the compounds produced according to Examples I, II and III by the method of Sonelli, Shibault and Ringler, Endocrinology 77: 625, 1965 as similar to aspirin. Briefly, this method comprises topical coapplication of the test substance and a 1% croton oil vehicle to one ear of an intact rat while the other ear is used as a control. The 1% croton oil vehicle elicits a philogostic response characterized by edema, hyperemia and over-all increase in ear size. In each test six rats are used and after six hours the rat is lightly etherized and both ears removed and individually weighed. The anti-inflammatory effect of the test substance is determined by expressing the increase in weight of the tested ear as a percentage of the weight of the contralateral control ear. After 48 hours the rats are sacrificed and the thymi removed and weighed. The weight of the thymus after this time period is taken as an index of the systemic effects of the test substance.

The following are specific examples of animal feed compositions of this invention useful for increasing the rate of growth and feed efiiciency of young animals to market weight.

Example IX For young beef cattle, i.e., calves to yearlings running to two year olds, each animal is given 5 to 20 milligrams per day of the compound produced in Example I intimately admixed in about 18 to 22 pounds per head per day of a complete pelleted ration for about 180 days. The complete pelleted ration includes in addition to the compound of Example I the following:

Barley "percent" 4043 Molasses dried beet pulp do 34.5-37.5 Alfalfa pellets do 8.0 Tallow do 2.5 Calcium carbonate do .30 Urea do .30 Phosphorus source do .40 Salt do .50 Molasses do 10.00 Trace mineral do 0.5 Vitamin A I.U./ton 24MM Note: Milo or corn, for example, can be substituted for the barely.

The compound of Example I is admixed with the above ingredients in a stationary blender or -a feed mix truck in the following amounts in grams per ton to provide an appropriate complete pelleted feed with dosage levels ranging from 5 to milligrams per head per day.

Grams/ton: Mg./head/day .5 5 1.0 10 2.0 20 4.0 40 8 0 80 These gram amounts are premixed with, for example, 10 pounds of soybean hulls prior to admixture with the other ingredients.

Example X For young swine, i.e., six weeks old pigs to about pound pigs, each animal is given 5 to 20 milligrams per day of the compound of Example In intimately admixed in about 1 /2 to 5 /2 pounds per head per day of a grower Grower, Finisher, percent percent Ground Yellow Corn 77 86. 7 Soybean Meal (44% protein) 16 6. 5 Meat and Bone Scraps (50% protein) 2. 5 2. 5 Dehydrate Alfalfa Meal (17%) 2. 5 2. 5 Steamed Bone Meal 0. 5 0. 5 Ground Limestone 0. 5 0. 3 Iodized Salt 0.5 0.5 Vitamin, Anti 'otic and Trace Mineral Ireniix 0.5 O. 5

The compound of Example III is admixed with the above ingredients in a blender in the following amounts in milligrams per pound to provide an appropriate feed with dosage levels ranging from 6 to 96 milligrams per head per day.

Mg./pound: Mg./head/day 2 6 4 12 8 24 16 48 32 96 Example XI For 4 to 10 month old lambs weighing 50 to 70 pounds, each animal is given 1 to milligrams per day of the compound of Example IV, intimately admixed in about 3 to 6 pounds per head per day of a complete ration for to 90 days. The complete ratio includes in addition to the compound of Example IV the following:

The compound of Example IV is admixed with the above ingredients in a blender in the following amounts in milligrams per pound to provide an appropriate complete feed with dosage levels ranging from 1 to 15 milligrams per head per day.

Mg./pound: Mg./=head/day .5 2 1.0 4 1.5 6 2.0 8 2.5 10 3.75 15 Example XII For broilers, i.e., day old to four week old chicks, a grower feed is prepared for feeding to the chicks for the first four weeks and a finisher feed is prepared for feeding the four week old chicks for the last five weeks until they reach market weight of two and a half to three pounds dressed. For each pound of weight gain, the chicks eat about 1.5 to 2 pounds of feed. Thus. they eat about 1.5 pounds of feed during the first four weeks and about five pounds of feeds during the next five weeks. During the course of this feeding schedule, each bird should receive a total of about 12 to 36 milligrams of the compound of Example I in the grower and finisher feed each of which includes in addition to the compound of Example I the following:

Grower Finisher (lbs.) (lbs) Ground Yellow Corn 1, 000 1, 200 Soybean Meal (44% Protein) 700 500 Fish Meal (60% Protein) 100 80 Alfalfa Meal 50 50 Meat and Bone Scraps. 0 30 Animal Fat 80 80 Dicalciurn Phosphate Iodized Salt 10 10 Limestone l5 Premix Vitamins Trace iotics 10 Example XIII 242 grams of PBS were dissolved in 5 gallons of isopropyl alcohol and the solution was charged to an autoclave together with 400 grams of Raney nickel. The autoclave was sealed, pressured with hydrogen to 500 p.s.i., heated to C. and the reaction continued with stirring for five hours. The contents of the autoclave were filtered, 1500 milliliters of the filtrate were concentrated to 70 milliliters and, after remaining overnight, 4.68 grams of solids were recovered. Recrystallization of the solids from milliliters of isopropyl alcohol gave 2.3 grams of the product of Example I having a melting point of 225- 227 C.

Analysis.-Calculated: C, 65.82; H, 9.82. Found: C,

where R is selected from the group consisting of hydrogen, lower alkyl, lower saturated acylic acyl and benzyl.

2. The compound of claim 1 wherein R is hydrogen.

3. The compound of claim 1 wherein R is lower alkyl.

4. The compound of claim 1 wherein R is methyl.

5. The compound of claim 1 wherein R is ethyl.

6. The compound of claim 1 wherein R is lower saturated acylic acyl.

7. The compound of claim 1 wherein R is acetyl.

8. The compound of claim 1 wherein. R is benzyl.

9. An animal feed comprising a nutrient ration and a growth promoting amount of the compound of claim 1.

10. An animal feed comprising a nutrient ration and a growth promoting amount of the compound of claim 2.

No references cited.

A. LOUIS MONACELL, Primary Examiner. H. H. KLARE, Assistant Examiner. 

